Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76348e6831d2a9b43cb7861cf367c3287e892ac19878d1045b34a0667b405a10' 
  AND token = 'JZ89BkI1tDNpfjU8G1v4AU0tmzASq86TwL9AVTnSA1M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}